Why Retirees Fear Healthcare Costs — and What Medicare Actually Covers

Healthcare costs are the single biggest financial fear among American retirees — and the anxiety is entirely justified. Unlike housing or food expenses, medical costs in retirement are unpredictable, can spike suddenly, and are only partially covered by the Medicare program most people assume will take care of them. Research from the Center for Retirement Research at Boston College consistently shows that retirees dramatically underestimate what they will spend on healthcare over the course of their retirement, and that gap between expectation and reality is where financial hardship begins.

The core problem is that Original Medicare — the federal program consisting of Part A (hospital insurance) and Part B (medical insurance) — was never designed to be a comprehensive health plan. It was designed in 1965 as a safety net, and its cost-sharing structure reflects that era. Today, in 2026, Part A carries a hospital deductible of $1,676 per benefit period, not per year. That distinction matters enormously: if you are hospitalized, discharged, and then readmitted more than 60 days later, you owe that deductible again. There is no limit to how many times this can happen in a single year. Part B, which covers doctor visits, outpatient procedures, and durable medical equipment, requires a monthly premium of $185.00 in 2026 for most beneficiaries, plus a $257 annual deductible, after which Medicare pays 80% of approved costs. You are responsible for the remaining 20% — with no cap.

That uncapped 20% coinsurance under Part B is where retirees can get into serious financial trouble. Consider a major cancer treatment, a cardiac procedure, or a prolonged course of chemotherapy. If Medicare-approved costs for your treatment total $200,000 in a year, your 20% share is $40,000. Nothing in Original Medicare stops that number from climbing higher. This is not a hypothetical edge case — it is the lived reality for hundreds of thousands of Medicare beneficiaries each year who face serious illness. The absence of an out-of-pocket maximum under Original Medicare is one of the most consequential and least understood features of the program.

Long-term care is the other enormous exposure that Medicare does not cover in any meaningful way. Medicare Part A will pay for up to 100 days in a skilled nursing facility following a qualifying hospital stay of at least three days, but the coverage is not free even within that window. Days 21 through 100 in a skilled nursing facility carry a daily coinsurance of $209.50 in 2026. After day 100, Medicare pays nothing. Custodial care — help with bathing, dressing, eating, and other activities of daily living — is explicitly excluded from Medicare coverage regardless of how medically necessary it may be. Medicaid covers long-term care for those who qualify based on income and assets, but middle-income retirees often spend down their savings before becoming eligible. Long-term care insurance can help bridge this gap, though premiums have risen sharply and the market has contracted significantly over the past decade.

For retirees who want to protect themselves from Medicare's cost-sharing gaps, there are two primary paths: Medigap (also called Medicare Supplement Insurance) and Medicare Advantage. These are fundamentally different products, and the choice between them has long-term consequences that are difficult to reverse. Medigap plans are sold by private insurers and work alongside Original Medicare. You keep your Medicare benefits and the Medigap plan pays some or all of the costs Medicare doesn't cover, depending on the plan letter you choose. Plan G is currently the most comprehensive option available to new Medicare enrollees (Plan F, which covered the Part B deductible, was closed to new enrollees as of January 1, 2020). In 2026, Plan G covers the Part A deductible, Part A coinsurance, Part B coinsurance, skilled nursing facility coinsurance, and foreign travel emergencies — leaving you responsible only for the $257 Part B deductible. Monthly premiums for Plan G vary widely by insurer, age, and location, but typically range from roughly $100 to $250 per month for a 65-year-old, depending on your state and the insurer's pricing method.

Medicare Advantage plans, sold under Part C, take a different approach. Instead of supplementing Original Medicare, these plans replace it entirely. You receive your Part A and Part B benefits through a private insurer — typically an HMO or PPO — that may also bundle Part D drug coverage and extras like dental, vision, and hearing benefits. Medicare Advantage plans are required to cap your out-of-pocket costs for covered services; in 2026, that cap is set at $9,350 for in-network services. Many plans advertise $0 monthly premiums, which can be appealing, but the trade-off is a narrower network of providers, prior authorization requirements for many services, and cost-sharing structures that can add up quickly if you use a lot of care. Beneficiaries who travel frequently or who have established relationships with specialists outside a plan's network often find Advantage plans frustrating.

Switching from Medicare Advantage back to Original Medicare is where many retirees encounter a painful surprise. If you enroll in a Medigap plan when you first become eligible for Medicare at 65, you have guaranteed issue rights — meaning insurers cannot deny you coverage or charge you more based on your health history. But if you wait, or if you leave a Medigap plan and later want to return, insurers in most states can use medical underwriting to deny your application or charge significantly higher premiums based on pre-existing conditions. This means a retiree who chose a Medicare Advantage plan at 65 because it seemed affordable, and who develops a serious illness at 72, may find it impossible to get a Medigap plan at any price when they try to switch back. The window of guaranteed issue rights at initial enrollment is one of the most valuable and time-limited protections in Medicare — and most new enrollees don't know it exists until it's gone.

There are exceptions to the medical underwriting rules. Thirteen states have enacted birthday rule protections that give Medigap enrollees a 30-day window each year around their birthday to switch to a plan of equal or lesser benefits without medical underwriting. Those states are California, Idaho, Illinois, Kentucky, Louisiana, Maine, Maryland, Missouri, Nevada, New Jersey, New York, Oklahoma, and Oregon. If you live in one of these states and are currently enrolled in a Medigap plan, your birthday window may allow you to shop for a lower premium each year without risking your coverage. New York and Connecticut go further, requiring guaranteed issue for Medigap plans year-round regardless of health status.

Prescription drug costs represent a third major exposure for retirees, and one that has seen significant policy changes in recent years. The Inflation Reduction Act of 2022 introduced a $2,000 annual out-of-pocket cap on Part D drug costs, which took effect in 2025. This is a meaningful protection for beneficiaries who take expensive specialty medications — previously, there was no cap on what you could spend on drugs under Part D. The law also expanded the Low Income Subsidy (LIS) program, sometimes called Extra Help, which reduces or eliminates Part D premiums, deductibles, and copays for beneficiaries with limited income and resources. In 2026, individuals with annual income up to roughly $22,590 (or $30,660 for a married couple) may qualify for Extra Help. If you haven't checked your eligibility recently, it's worth doing — the Social Security Administration administers the program and applications can be submitted at ssa.gov.

For beneficiaries who are still working past 65 and covered by an employer plan, the coordination between employer insurance and Medicare involves important sequencing rules. If your employer has 20 or more employees, your employer plan pays first and Medicare pays second. In this situation, many people choose to delay enrolling in Part B to avoid paying the premium while they have employer coverage. That is generally a sound strategy — but you must enroll in Part B within eight months of losing that employer coverage to avoid a permanent late enrollment penalty of 10% added to your Part B premium for every 12-month period you were eligible but not enrolled. That penalty lasts for as long as you have Part B, which for most people means the rest of their life.

The Annual Enrollment Period, running from October 15 through December 7 each year, is when Medicare Advantage and Part D plan enrollees can review and change their coverage for the following year. This window matters because plans change their premiums, formularies, and provider networks annually. A drug that was covered at a low tier in 2025 may be on a higher cost-sharing tier in 2026, or dropped from the formulary entirely. The Medicare Plan Finder tool at medicare.gov allows you to enter your specific medications and compare actual estimated annual costs across available plans in your zip code — it takes about 20 minutes and can potentially save you hundreds of dollars. The Open Enrollment Period from January 1 through March 31 gives Medicare Advantage enrollees one additional opportunity to switch plans or return to Original Medicare if their January 1 plan isn't working for them.

State Health Insurance Assistance Programs, known as SHIPs, offer free, unbiased counseling from trained volunteers who can help you compare plans, understand your rights, and navigate enrollment. Every state has a SHIP program — you can find your local contact at shiphelp.org or by calling 1-800-MEDICARE. Unlike insurance brokers, SHIP counselors have no financial stake in which plan you choose. For retirees who feel overwhelmed by the complexity of Medicare decisions, a SHIP counselor is often the most valuable resource available — and it costs nothing.